journal article·2008-12-09

From Core/Shell Structured FePt/Fe3O4/MgO to Ferromagnetic FePt Nanoparticles

Jaemin Kim, Chuanbing Rong, Youngmin Lee, J. Ping Liu, Shouheng Sun

Chemistry of Materials· Volume 20· Issue 23
Publisher page

Abstract

This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe 3 O 4 /MgO NPs followed by MgO removal. The fcc-FePt/Fe 3 O 4 NPs are made by a one-pot reaction of Pt(acac) 2 with Fe(CO) 5 in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac) 2 . The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650 °C annealing of the fcc-FePt/Fe 3 O 4 /MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.
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Research context

OpenAlex topics: Magnetic properties of thin films · Electromagnetic wave absorption materials · Copper Interconnects and Reliability

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, Brown University, Rhode Island 02912, and Department of Physics, University of Texas at Arlington, Arlington, Texas 76019

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